JPS6233282A - Heat-resistant block - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is used to form furnace walls, etc. using inorganic fibrous molded bodies (inorganic fibrous blankets) such as alumina fibers and ceramic fibers. Regarding heat-resistant blocks.

[Prior art]

- In general, the internal temperature of various types of industrial furnaces is as high as 10-100 degrees Celsius, so the internal walls of the furnace, which are made of iron plates, etc., are lined with refractory bricks or other refractory materials to ensure high temperature resistance. Sufficient fireproofing treatment had been applied, such as rinsing.

At this time, the method of lining the furnace wall using refractory bricks is as follows:
It takes a long time to construct on-site, requires material and equipment costs, and is inferior in heat resistance. Moreover, since the furnace wall is formed by stacking refractory bricks, it is structurally weak and unsuitable for forming large furnaces or blast furnaces.

An example of the prior art belonging to the latter category is the invention described in Japanese Patent Publication No. 53-14085.

As shown in Fig. 5, a large number of plate-shaped ceramic fiber blankets b are compressed and laminated along a furnace casing a formed of an iron plate or the like, and the ceramic fiber blankets b are supported in the lamination direction. The rod C is inserted, and a part of the support d, which is integrally arranged on one side of the side surface of the ceramic fiber blanket b in the stacking direction, is made to protrude between the ceramic fiber blankets 5 without protruding to the other side, and this protrusion The support rod C
This is a refractory heat insulating structure in which a furnace wall e is formed by holding a ceramic fiber blanket b and fixing it.

However, in the refractory heat insulating structure having the above structure, during operation of the furnace, the support member d thermally expands particularly in the direction opposite to the furnace casing a, so that the support rod C inserted into the ceramic fiber blanket b expands accordingly. Move in the opposite direction of the furnace casing a. Therefore, the fibers of the ceramic fiber blanket b may be broken and cracked or deformed due to the effects of high heat. Therefore, the other stacked ceramic fiber blankets b break on the insertion surface of the support rod C on the opposite side of the furnace casing a than the support rod C, resulting in a disadvantage that the life of the furnace casing a is shortened. At this time, use the ceramic fiber planket b
To perform partial replacement and replenishment of the support rod C from the support d
Partial replacement of the ceramic fiber blanket b is also not easy because it has to be removed.

[Purpose of the invention]

This invention was made in view of the above points,
The purpose of this is to manufacture individual blocks in a factory to reduce equipment and material costs, shorten the construction period on site, and reduce construction costs. The inorganic fibrous molded body does not crack or deform even if it thermally expands in the direction, forming a heat-resistant furnace wall inside the furnace casing, and replacing the inorganic fibrous molded body with respect to the mounting board. The purpose is to provide an i+= block that can also be easily implemented.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Note that the same parts are indicated by the same reference numerals in each figure. 1 is a furnace casing made of iron plate or the like, and 2 is a mounting board made of metal lath, etc., which serves as a core material and has a large number of filling voids 2a.After installation, this mounting board 2 exhibits sufficient strength and heat resistance. It is advantageous for assembly and processing to exhibit some flexibility during assembly and processing, and for example, JIS standard flat lath No. 3 to 4 metal lath is suitable, but punch metal (not shown) can be used instead of metal lath. A perforated iron plate) may also be used.

In addition, the size of the mounting board 2 is determined in order to tightly connect adjacent blocks A to each other and prevent joints from opening.
Use a block that is about 10 m smaller in length and width than the size of the block to be formed.

Reference numeral 3 denotes one end protruding from an example end (front end) of the mounting board 2 so as to be connected to the rear lower surface of the preceding single block A that is arranged continuously along the inner surface of the furnace casing 1 during assembly. This is a stepped insert piece used as a connecting means. 4
is a support body as the other connecting means, which is provided in plural pieces, for example, two pieces, in the thickness direction on the other side end (rear end) of the mounting board 2, and this support body 4 is provided in the thickness direction of the mounting board 2 during assembly. It is fixed by welding or the like to the inside of the furnace casing 1, which is a member to be fixed located at.

Reference numeral 5 denotes a refractory mortar layer that is coated and solidified using the mounting board 2 as a core material.This refractory mortar layer 5 may be a normal refractory mortar, but it may be made of a material that does not soften again when moisture in the furnace casing 1 condenses, for example. Self-hardening water glass-based materials or air-hardening colloidal silica-based materials are preferred.

6 is a block-shaped inorganic fibrous molded body made of high heat resistant inorganic fibers such as alumina fibers or ceramic fibers, and this S machine fibrous molded body 6 is attached to the mounting board 2 via the fireproof mortar layer 5. Glued to and retained. Moreover, this inorganic fibrous molded body 6 is produced by a wet molding method.
Possible examples include those molded with an organic binder, those made by mechanically laminating small pieces of needled plumkets and bonding the pieces between the pieces with an organic binder, and even those sewn together with thread.

7 is compressed onto the mounting board 2 via a refractory mortar eyebrow 5;
These support rods are made of heat-resistant steel to fix the laminated taIJk fibrous molded bodies, and there are a plurality of support rods 7 facing each other in alternating planes, for example, two on each side, for example, four in total. , by fixing one end (lower end) to the left and right ends of the upper surface of the mounting board 2, and attaching it at any angle, for example, to the left and right ends of the top surface of the mounting board 2.
It is installed at an angle of 30° to 45° to the
As shown in the figure, the radius is 100 to 20
It is preferable to use one bent with a curvature of 0 dragons. 7a is the free end of the support rod 7.

Reference numeral 9 denotes a heat-resistant inorganic fiber body that is attached in a compressed state between the furnace casing 1 and the mounting board 2 when forming the heat-resistant furnace wall 8 on the inner surface of the furnace casing 1;
Rock wool or ceramic fiber is used, and the temperature of the mounting board 2 and refractory mortar layer 5 is 100°C.
This is to prevent corrosion of the mounting board 2 due to dew condensation and to prevent re-softening of the refractory mortar layer 5.

One embodiment of the present invention has the above-mentioned configuration, and the heat-resistant furnace wall 8 is formed by placing the following block unit A between the rear part of the preceding block unit A and the two supports 4, 4 on the lower surface. The individual blocks A are sequentially connected to the inner surface of the furnace casing 1 by inserting the insertion piece 3 provided at one side end (front end) and making sure that each block is brought into close contact with each other so that there is no gap between the blocks. . In addition, since the heat-resistant inorganic fiber body 9 is installed in a compressed state between the furnace casing 1 and the mounting board 2, the block A can be attached to the furnace casing 1 without tilting against the uneven surface of the inner surface of the furnace casing 1. It is possible to form a stable heat-resistant furnace wall 8 that can be arranged along the wall and not fall down.

Next, each block unit A is fixed to the inner surface of the furnace casing 1 by welding the two supports 4 provided at the other end (rear part) of each block unit A to the furnace casing 1. In this way, the inner surface of the mounting board 2 of each block A is compressed.
The inorganic fibrous molded bodies 6 of each block A formed of laminated alumina fibers, ceramic fibers, etc. are connected.

Through such a procedure, the inner surface of the furnace casing 1 is covered with the single block A, and the heat-resistant furnace wall 8 is formed.

In addition, the inorganic fibrous molded body 6 made of alumina fiber or ceramic fiber material is attached to support rods 7.7 which are arranged at an arbitrary angle, preferably at an installation angle of 30 to 45 degrees, and are arranged in alternating planes. 7.Since it is fixed to the mounting board 2 by inserting it inside,
The inside of the furnace casing 1 becomes high temperature and the support rods 7, 7: 7.7
Even when the fibers thermally expand and elongate in the longitudinal direction, their free ends 7a enter the laminated inorganic fibrous molded body 6, so that the fibers are not pulled, and no stripes or dresses occur in the fibers. In this case, since the support rod 7 formed with a radius of 100 to 200 mm as shown in the figure has a curvature greater than that of a straight support rod, the average depth of each inorganic fibrous molded body 6 in the laminated state will be inserted. In addition, the support rods 7, 7: 7.7 are inserted alternately and two from the left and right into one inorganic fibrous molded body 6, so that
In addition to the adhesive force of the refractory mortar layer 5, it is firmly fixed to the mounting board 2.

Further, in the above embodiment, in order to fix the block to the furnace casing 1, the support 4.4 provided at the rear end of the mounting board 2 is fixed to the furnace casing 1 by welding or the like. The mounting board 2 may be fixed to the furnace casing 1 by screwing means using bolts 10 and nuts 11 fixed to the mounting board 2, as shown in FIG. Even when there is no furnace casing 1, the heat-resistant furnace wall 8 may be formed by suspending the hook 12 fixed to the mounting board 2 by supporting it on the support rod 13. In addition, in the case shown in FIG. 3, the nut 11 is attached to the bolt 10.
By removing it, the block A can be partially replaced.

〔Effect of the invention〕

As described above, the present invention has a structure in which a plurality of support rods are inserted in the thickness direction at arbitrary angles so as to face each other in alternating planes into the inorganic fibrous molded body compressed and laminated in the middle direction of the mounting board. Even if the support rod expands due to high heat, especially in the axial direction, the heat-resistant inorganic fibrous molded body will not crack or deform, making it possible to form a high-heat-resistant furnace wall.
Protect the furnace from high temperatures for long periods of time.

In addition, since individual blocks are manufactured in a factory rather than on-site construction, equipment costs and material costs are low, as well as on-site assembly time is short, construction costs are low, and work can be done easily.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway slope view showing one embodiment of the present invention, and FIG.
3 is a sectional view of the second embodiment showing another connecting means, FIG. 4 is a sectional view of the third embodiment, and FIG. 5 is a sectional view of the conventional It is a sectional view showing an example of this kind of fireproof insulation structure. ■ Furnace casing, 2 Mounting board, 3 Insert piece, 4 Support, 5 Refractory mortar layer, 6
...Inorganic fibrous molded body, 7... Support rod, 9... Heat-resistant inorganic fiber body. Patent applicant Denki Kagaku Kogyo Co., Ltd. Figure 2 Figure 4

Claims (1)

[Claims] A metal mounting board having a large number of filling voids, a plurality of support rods having one end fixed to both ends of the mounting board with appropriate inclination angles and facing each other in alternating planes; Consisting of connecting means provided at both ends, a refractory mortar layer solidified with the mounting board as a core material, and a compressed, laminated, high heat resistant inorganic fibrous molded body supported on the mounting board by the support rod. Heat resistant block.